Main author (year) country

Successful MR

Unsuccessful MR

P-value

Shaffer (2006) USA

UVD: 97.9%

CD: 2.1%

UVD: 65.7%

CD: 34.3%

P < 0.001

P < 0.001

Le Ray (2007)

France

SVD: 53 (67.1%)

ID: 23 (29.1%)

CD: 3 (3.8%)

SVD: 11 (16.2%)

ID: 17 (25.0%)

CD: 40 (58.8%)

NI

NI

P < 0.001

Sen (2013) Japan

UVD: 14 (100%)

CD: (0%)

UVD: 11 (69%)

CD: 5 (31%)

P < 0.05

P < 0.05